Year 1, Hadrian Peverell and the Philosopher's Stone

White Magic, Black Magic; doesn't matter. Both are nefarious and against the law. He-Who-Must-Not-Be-Named, a practitioner of the former. The Boy-Who-Lived is the descendant of a family of practitioners of the latter. With the law close to tipping over into making it legal to siphon Pure-Bloods in order to equalize power, the Wizarding World isn't the same, nor is the Blood War.